.loading{
    background:url(./img/loading-1.gif) no-repeat;
    position:fixed;
    height:50px;
    width:50px;
    top: 50%;
    left: 50%;
    -webkit-transform: translate3D(-50%,-50%,0);
    transform: translate3D(-50%,-50%,0);
    z-index: 200000;
}
.block{
    display: none
}
.Tips{
    color: #fff;
    position: fixed;
    padding: 10px 20px;
    top: 50%;
    left: 50%;
    -webkit-transform: translate3D(-50%,-50%,0);
    transform: translate3D(-50%,-50%,0);
    background-color: rgba(0, 0, 0 ,0.7);
    border-radius: 5px;
    z-index: 2020000;
}